Answer :

What do you mean? How many nations helped fight in the war that freed the US from Great Britain or how many states were united to make the US?

The name "United Nations", coined by United States President Franklin D. Roosevelt was first used in the Declaration by United Nations of 1 January 1942, during the Second World War, whenrepresentatives of 26 nations pledged their Governments to continue fighting together against the Axis Powers.

 UN Radio Classics | British actor Sir Laurence Olivier reads the Preamble to the Charter of the UN
24 October 1945 || The United Nations officially comes into existence


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